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#1
01-24-2010, 03:25 PM
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Found the answer to the riddle. Filament winding for the 6W4 was arcing at chaiss under the TV/Phono switch. Will repair by adding a 6v3A transformer. Hope it didn't damage anything else.
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#3
01-25-2010, 07:09 AM
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Oh that's just the one that shocks you when you touch the chaiss and ground.
Terry
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#4
01-25-2010, 10:38 AM
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Quote:
Get that thing outta' there!! 
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#5
02-01-2010, 09:15 PM
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Well I disconnected the original filament wiring and hooked up a separate filament transformer for the damper tube. Also replaced the lead on the flyback to the 6BG6 plate cap. Put it all back together and it worker great!!The best picture I've seen on that set. For a hour. Came in here to the computer for a bit and smelled something bad in the other room. I think the replacement transformer didn't have enough insulation and it arced over internally.I could hear it arcing. I not quite sure what happen after that but it toasted the width coil, that's what was stinking up the joint. Lost hv to the crt.
Dug up a transformer with a 3Kv insulation and install that. Replaced the width coil. Wasn't making enough hv and had shrunken picture. Long story short replaced the 6BG6 & 6W4 and it seems to be working great again. I think my wife thinks it's going to set the house on fire! Terry ps Anybody got a spare width coil for a RCA KCS-47A?
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#6
02-02-2010, 01:19 PM
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This was a common problem with any set that used a 6W4 damper tube. The breakdown voltage from filament to cathode is rather low for a tube subjected to such high pulse voltages.
Replace the 6W4 with a 6AX4, or better yet, a 6AU4. This will prevent this problem from reoccurring.
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#7
02-02-2010, 05:51 PM
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So is it common to smoke the width coil when the 6W4 goes? Or should I take a look for other problems?
Terry
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